The Joint International Workshop on Social Influence Analysis and Mining Actionable Insights from Social Networks (SocInf/MAISoN 2018) will take place in July 2018 in Stockholm, Sweden. The workshop is part of the International Joint Conference on Artificial Intelligence (IJCAI 2018), which in turn is this year part of the Federated AI Meeting (FAIM 2018) featuring amongst others ECAI 2018 and ICML 2018.